An extremely tall person who dresses in all the latest NBA basketball clothing (shoes, jerseys etc) but actually has no skill nor coordination when playing basketball either socially or competitively.
Person A: "Wow, look at Tony, he's 7 foot, has a LeBron jersey AND a pair of Air Jordan's - he must be a great at basketball."

Person B: "You'd be surprised, he hasn't made a shot all season, and by 'all season' I mean all his life. He is pretty Un-b-a bro"
by hisboyelroy February 20, 2011
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the word un-b is an abbreviation of unbelievable. it can be used 2 describe basically anything.
Randal: Dude, come over to my house now i just got an xbox 360.
Drake: Oh my God. Those things are fucking un-b.
by .zola January 13, 2007
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